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Every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), so platform drivers that rely on the existence of a device's ACPI companion object need to verify its presence. Accordingly, add requisite ACPI_COMPANION() checks against NULL to the platform/x86 sony-laptop driver. Fixes:138db7ee58("platform/x86: sony-laptop: Convert PIC driver to a platform one") Fixes:14004dd31c("platform/x86: sony-laptop: Convert NC driver to a platform one") Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/1871155.VLH7GnMWUR@rafael.j.wysocki Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>